Introduction of 5.0 t/ha of phosphogypsum contributed to the receipt of 1.69 t/ha of oil flax seeds; yield increase was 0.36 tons per hectare or 27%. The content and collection of oil also reliably increased. Winter wheat grain yield in the variant with phosphogypsum was 5.48 tons per hectare; yield increase, in this case, reached 0.74 tons per hectare or 15.6%. Harvest index (HI) of winter wheat in the trial fields with phosphogypsum was 50.0%; the same in the control variant (without phosphogypsum) – 38.0%.

The paper presents the data from two field experiments on the effect of microbiological preparations, growth stimulants and fertilizers on the yield and quality of grain of various varieties of winter wheat. In the first experiment, the following biological products were studied: Extrasol, Rostock and water-soluble fertilizers Aquamix, Aquarin 5 and Aquarin 9 on winter wheat varieties Niva Stavropolya in crops according to forecrop of black fallow and Victoria 11 in crops according to the forecrop oil flax. It was found that the highest yield had Niva Stavropolya variety - 5.59 t / ha and in Victoria 11 variety - 3.97 t / ha, as well as the best grain quality were formed with the combined application of fertilizers and biological products in the following combination: P60κ40 before sowing (according to forecrop black fallow) and N60P60K40 (according to forecrop oil flax) + N30 for tillering + + N30 for heading. At the same time, before sowing, it is advisable to use the water-soluble fertilizer Aquamix (0.1 l / t) for seed treatment, -Aquamarine 5 (2 l / ha) and for the treatment of vegetative plants in tillering and Aquarine 9 (2 l / ha) for heading. In the second experiment, the effect of microbiological preparations Emistim / biostim, Rizoagrin, Flavobacterin, Extrasol and growth regulators Rostok and Gumat on the productivity of soft winter wheat varieties Yuka and Grom in crops after the forecrop black fallow was studied. It was found that the highest yield of the variety Grom - 9.24 t / ha was provided by Emistim and Yuka variety - 9.03 t / ha Humat growth regulator.

The current  paper  has  presented  the  data  on  the efect of bio products  “Extrasol”,  “Rostok”,  “Aquamix”  and water-soluble “Aquarin 5” and  “Aquarin 9” on productivity and yield structure elements of  the  intensive winter wheat variety  “Niva Stavropoliya” and the half-intensive variety “Viktoriya” sown after oilseed fax on the fertilized felds. There has been established that the largest yields of  the variety  “Niva Stavropoliya”  (5.59  t/ha) and of  the variety  “Viktoriya”  (3.7  t/ha) were  formed under  the compound use of  fertilizers and bio products as follow: Р60К40  before sowing  (in a weedfree  fallow) and N60Р60К40  (sown after oilseed fax) + N30 in the tillering phase + N30 in the phase of head formation + “Aquamix” (0.1 l/t in seed treatment) + “Aquarin 5” (2 l/ha in the tillering phase) + “Aquarin 9” (2 l/ha in the phase of head formation). There has been identifed that the main yield structure elements of the studied varieties showed their largest values under the compound use of the bio products “Aquamix” and water-soluble “Aquarin 5” and “Aquarin 9” on  the  fertilized felds. On average  for 3 years  the variety “Niva Stavropoliya” showed  the  increase of ‘number of ears’  from 413 pcs per m2  in  the control variant, and  to 432–467 pcs per m2 in the treated variants.  the variety  “Victoria 11” had 357 pcs per m2 in the control variant and 379–415 pcs per m2 in the treated variants. In addition, in comparison with the control variants, there has been identifed an increase of other yield structure elements, namely “number of grains per head”, “grain weight per head” and “1000-grain weight”.

Введение. Подсолнечник является основной мас-личной культурой в нашей стране, на долю которой приходится не менее 70% производства раститель-ного масла. В народном хозяйстве его используют как в натуральном виде, так и для получения марга-рина, кулинарных, кондитерских, косметических и ла-кокрасочных изделий (Васильев, 1990).В то же время высокие и стабильные урожаи этой культуры, как правило, связаны с применением по-вышенных доз дорогостоящих минеральных удобре-ний, которые в засушливые годы не дают желаемого результата (Тишков, 2003 В условиях Южного федерального округа подсолнечник является одной из самых высокодоходных культур. При этом уровень урожайности и качество семян напрямую зависит от технологии возделывания и применяемых агрохимикатов. В на-стоящей работе были проведены полевые опыты с крупноплодным подсолнечником сорта СПК по выявлению его отзывчи-вости на применение аминохелатных удобрений серии «Агровин», их экономической и биоэнергетической эффективности. Исследования показали, что наиболее эффективным является совместное применение аминохелатных удобрений «Агровин Микро» 0,8 л/га + «Агровин Универсал» 1 кг/га в фазе 6-8 листьев. В этом случае была получена максимальная урожайность семян -2,53 т/га с наибольшим условно чистым доходом 22 922 руб./га, наименьшей себестоимостью семян 5940 руб./т и уровнем рентабельности 153%. Здесь же были достигнуты самые высокие чистый энергетический доход (33 774 МДж/га) и коэффициент энергетической эффективности (КЭЭ -4,0). University» 347740, Rostov region, Zernograd, Sotsialisticheskaya Str., 35/42 A.N. Nekhoroshev, general director, agrostil@agrostil.com, ORCID ID: 0000-0002-7436-8153 LLC «Agrostil» 141070, Moscow region, Korolev, Channel pr., 7 In the Southern Federal District, sunflower is one of the most highly productive and profitable crops. At the same time, the level of yield and quality of kernelss directly depends on the cultivation technology and applied agrochemicals. The present work considers the field trials conducted with the large-kerneled sunflower variety 'SPK' to identify its responsiveness to the use of amino-chelate fertilizers 'Agrovin', its economic and bioenergetic efficiency. The study shows that the most effective combination is a simultaneous use of amino chelate fertilizers 0.8 l/ha of 'Agrovin Micro'+ 1 kg/ha of 'Agrovin Universal' in the phase of 6-8 leaves. In that case the maximum yield of seeds was obtained (2.53 t/ha with the largest share of the estimated net income of 22 922 rubles/ha and the lowest seed cost of 5940 rubles/t with 153% of profitability). Thus, the highest net energy income of 33 774 MJ/ha and 4.0 of the energy efficiency ratio (EER) were achieved. Ключевые слова: подсолнечник, урожайность семян, прибавка урожая, экономическая и биоэнергетическая эффек-тивность. ECONOMIC AND BIOENERGETICS EFFICIENCY OF THE GROWTH STIMULATOR 'AGROVIN' AT SUNFLOWER CULTIVATIONG